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#! /usr/bin/python
#
# copyright (c) 2006 Josselin Mouette <joss@debian.org>
# Licensed under the GNU Lesser General Public License, version 2.1
# See COPYING for details
from optparse import OptionParser
import sys,os.path
sys.path.append("/usr/share/python-support/private/")
import pysupport
parser = OptionParser(usage="usage: %prog [options] file.pyversions")
parser.add_option ("--minmax", action="store_true", dest="minmax", help="display minimum and maximum python versions described by the file", default=False)
parser.add_option ("-l", "--long", action="store_true", dest="long", help='prepend versions with "python"',default=False)
parser.add_option ("--pycentral", action="store_true", dest="pycentral", help="Parse a pycentral-type version string instead",default=False)
parser.add_option ("--raw", action="store_true", dest="raw", help="Output the raw input string (useful with --pycentral)",default=False)
parser.add_option ("--all", action="store_true", dest="all", help="List all supported versions instead of parsing a file",default=False)
(options, args) = parser.parse_args()
if options.all:
f=iter(['-'])
else:
if len(args) < 1:
f=sys.stdin
else:
f=file(args[0])
if options.pycentral:
import re
l=None
paraborder=True
for line in f:
line=line.strip()
if line.startswith('#') or not line: # Empty line or comment
if paraborder==True:
# We're at the beginning of debian/control
continue
# We reached the end of the first paragraph, don't keep on reading
break
paraborder=False
if line.lower().startswith(("xs-python-version:", "x-python-version:")):
l=line.split(':')[1]
break
if not l:
print "X(S)-Python-Version header not found."
sys.exit(1)
min=max=""
out=[]
for elem in l.split(','):
elem=elem.strip()
if elem=="all":
min=max=""
out=["-"]
break
if elem=="current":
out.append(os.readlink("/usr/bin/python")[6:])
continue
a=re.match(">=\s*([\d\.]+)",elem)
if a:
min=a.group(1)
continue
a=re.match("<<\s*([\d\.]+)",elem)
if a:
try:
max=a.group(1).split(".")
max[1]=`int(max[1])-1`
max='.'.join(max)
except IndexError:
max=""
continue
a=re.match("^[\d\.]+$",elem)
if a:
out.append(elem)
if min or max:
out.append(min+"-"+max)
stringtoparse=','.join(out)
else:
stringtoparse=f.next()
if stringtoparse.startswith("pyversions") and "=" in stringtoparse:
# Case of a .public file with version info
stringtoparse = stringtoparse.split("=",1)[1]
elif stringtoparse.startswith("/"):
# Case of a .public file without version info
stringtoparse = "-"
if options.raw:
print stringtoparse.rstrip('\n')
sys.exit(0)
v=pysupport.version_list(stringtoparse)
if options.long:
print ' '.join(v)
else:
print ' '.join(v.verlist)
if options.minmax:
min=v.min
if options.long and min: min="python"+min
max=v.max
if options.long and max: max="python"+max
print min, max
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